This is a unit in 6 sessions about the seasons on earth. Learners will investigate the reason for seasons on earth. They will look at the circular orbit of earth, year-long temperature and daylight hours across different latitudes, compare models of... (View More) the earth with and without tilt, investigate angle and intensity of sunlight, and ends with a discussion to solidify their understanding of the reason for seasons. It supports the process of modeling to determine an answer to a question. This is Unit 2 of the GEMS Space Science Sequence for Grades 6-8, which is available for purchase (see related link). (View Less)

This is a unit of 8 sessions about the Sun-Earth system. Learners will construct a model to show the relative size and scale of the Sun-Earth system, investigate the visible and electromagnetic spectrums, discuss solar flares and solar weather,... (View More) develop a UV shield, and discuss the results of their investigations. The unit is set in the context of solving a mystery and supports the idea that scientific explanations are based on evidence. This is Unit 1 of the GEMS Space Science Sequence for Grades 6-8, which is available for purchase (see related link). (View Less)